Minutes_2020_11_17

Numba Meeting: 2020-11-17

Attendees: Hameer, Siu, Stuart, Guilherme, Todd, Graham, Juan

Numba extras/addons/junkyard repo name reveal
- https://numba.discourse.group/t/a-new-repo-for-extra-features/229/3?u=sklam
- "numba-extras"
0.52 RC3 update
- pending last PRs
  - preventing users from installing py3.9
  - fixing a accidentally introduced deprecationwarning.
Siu showed notebook: https://github.com/numba/numba-examples/blob/f75b6ab960c30c099a77f416e9eb2bb464ec4f01/notebooks/Numba_052_refpruner.ipynb
Stuart mentions loop-distribution
- we have no intuition of what optimization passes work
- relies on benchmark and writing diagnostic
- suggests exposing all llvmlite pass
Stuart has been putting together compiler-engineer topics tutorial orientated for Numba
- asking for feedbacks
- suggest others to contribute new tutorials
- stuart will post to binder

#6485 - Numba fails to install on python3.6.9
#6484 - Cannot convert unicode or char dtype to longer fixed size
#6482 - Set maximum Python version for numba and llvmlite sdists?
#6481 - slicing c-contiguous array in row-major way yields non-c-contiguous array in numba (though not in numpy)
- Probably a bug in the code that parses the types for the reshape().
#6479 - Update canonical_url configuration in docs
- Needs fixing
#6478 - Array analysis error for constant float tuple creation
- Is there any place where a float in a tuple would degrade to an int?
**** #6475 - MLIR based backend for Numba
- Is interesting, but will need a closer look, 6 month time frame, highly experimental
#6473 - Array assignment to a structure's nested array
- Unhelpful error messages, fix those first, then fix the problem
#6465 - PPC lowering error from changes on optimization passes
- Problem with PowerPC, IBM staffer is looking at it
- Most targets have issue
#6462 - Feature request: bytes.decode
- Two weeks of typing
- Beyond good second issue, know what you are doing after 1 year of practice and then one to two weeks of typing

#6486 - fix abstract base class import
- File was excluded from flake8
- Maybe we need a similar test as Fastparquet
#6469 - Add address space in pointer type
#6468 - Access replace_functions_map via PreParforPass instance
#6467 - Access ufunc_db via context